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{
This file is part of the Free Pascal run time library.
Copyright (c) 1999-2000 by Pierre Muller
Code to generate execution of all c functions
with constructors attributes
Based on .ctor and .dtor sections of DJGPP gcc compiler
See the file COPYING.FPC, included in this distribution,
for details about the copyright.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
**********************************************************************}
unit InitC;
interface
implementation
{ we need to include dpmiexcp unit
to avoid getting troubles with _exit found both
in libc and in v2prt0.as PM }
uses
dpmiexcp;
type
simple_proc = procedure;
var
first_ctor : longint;external name 'djgpp_first_ctor';
ctor : array [0..maxlongint div sizeof(simple_proc)-1] of simple_proc;external name 'djgpp_first_ctor';
last_ctor : longint;external name 'djgpp_last_ctor';
first_dtor : longint;external name 'djgpp_first_dtor';
dtor : array [0..maxlongint div sizeof(simple_proc)-1] of simple_proc;external name 'djgpp_first_dtor';
last_dtor : longint;external name 'djgpp_last_dtor';
bss_count : longint;external name '___bss_count';
const
save_exit : pointer = nil;
procedure run_c_constructors;
const
already_done : longint = -1;
var
f : simple_proc;
i,nb : longint;
begin
if already_done=bss_count then
exit;
already_done:=bss_count;
f:=ctor[0];
nb:=((cardinal(@last_ctor)-cardinal(@first_ctor)) div sizeof(pointer));
for i:=1 to nb do
begin
f();
f:=ctor[i];
end;
end;
procedure run_c_destructors;
const
already_done : longint = -1;
var
f : simple_proc;
i,nb : longint;
begin
exitproc:=save_exit;
if already_done=bss_count then
exit;
already_done:=bss_count;
f:=dtor[0];
nb:=((cardinal(last_dtor)-cardinal(first_dtor)) div sizeof(pointer));
for i:=1 to nb do
begin
f();
f:=dtor[i];
end;
end;
begin
run_c_constructors;
If cardinal(@first_dtor)<>cardinal(@last_dtor) then
begin
{ can exitproc be allready non nil here ?
you have to make really weird things to achieve
that be lets suppose it is possible !! (PM) }
save_exit:=exitproc;
exitproc:=@run_c_destructors;
end;
end.
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